Communication device
A communication device includes a first antenna group, a second antenna group, and a metal partition plane. The metal partition plane is positioned between the first antenna group and the second antenna group. The first antenna group includes four antenna elements. The second antenna group includes eight antenna elements. Two antenna elements of the first antenna group and four antenna elements of the second antenna group each have a first polarization direction. The other two antenna elements of the first antenna group and the other four antenna elements of the second antenna group each have a second polarization direction. The second polarization direction is different from the first polarization direction.
1. A communication device, comprising:
a first antenna group, comprising:
a first antenna element;
a second antenna element, disposed opposite to the first antenna element;
a third antenna element; and
a fourth antenna element, disposed opposite to the third antenna element;
a second antenna group, comprising:
a fifth antenna element;
a sixth antenna element, disposed adjacent to the fifth antenna element;
a seventh antenna element, disposed adjacent to the sixth antenna element and opposite to the fifth antenna element;
an eighth antenna element, disposed adjacent to the fifth antenna element and the seventh antenna element and opposite to the sixth antenna element;
a ninth antenna element;
a tenth antenna element;
an eleventh antenna element, disposed opposite to the ninth antenna element; and
a twelfth antenna element, disposed opposite to the tenth antenna element, wherein the fifth antenna element, the sixth antenna element, the seventh antenna element, and the eighth antenna element are interleaved with the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element; and
a metal partition plane, positioned between the first antenna group and the second antenna group;
wherein each of the first antenna element, the second antenna element, the fifth antenna element, the sixth antenna element, the seventh antenna element, and the eighth antenna element has a first polarization direction;
wherein each of the third antenna element, the fourth antenna element, the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element has a second polarization direction;
wherein the second polarization direction is different from the first polarization direction.
2. The communication device as claimed in claim 1 , wherein the second polarization direction is perpendicular to the first polarization direction.
3. The communication device as claimed in claim 1 , wherein the first polarization direction is parallel to the metal partition plane, and the second polarization direction is perpendicular to the metal partition plane.
4. The communication device as claimed in claim 1 , wherein the first antenna group covers a first frequency band from 2400 MHz to 2500 MHz, and a second frequency band from 5150 MHz to 5850 MHz.
5. The communication device as claimed in claim 1 , wherein the second antenna group covers a second frequency band from 5150 MHz to 5850 MHz.
6. The communication device as claimed in claim 1 , wherein the first antenna element and the second antenna element are interleaved with the third antenna element and the fourth antenna element.
7. The communication device as claimed in claim 4 , wherein a length of the metal partition plane is longer than or equal to 0.5 wavelength of the lowest frequency of the first frequency band.
8. The communication device as claimed in claim 4 , wherein a distance between the first antenna element and the second antenna element is longer than or equal to 0.125 wavelength of the lowest frequency of the first frequency band.
9. The communication device as claimed in claim 4 , wherein a distance between the third antenna element and the fourth antenna element is longer than or equal to 0.25 wavelength of the lowest frequency of the first frequency band.
10. The communication device as claimed in claim 4 , wherein a distance between any adjacent two of the fifth antenna element, the sixth antenna element, the seventh antenna element, and the eighth antenna element is longer than or equal to 0.125 wavelength of the lowest frequency of the second frequency band.
11. The communication device as claimed in claim 4 , wherein a distance between any adjacent two of the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element is longer than or equal to 0.25 wavelength of the lowest frequency of the second frequency band.
12. The communication device as claimed in claim 4 , wherein a distance between the metal partition plane and each of the first antenna element, the second antenna element, the fifth antenna element, the sixth antenna element, the seventh antenna element, and the eighth antenna element is longer than or equal to 0.125 wavelength of the highest frequency of the second frequency band.
13. The communication device as claimed in claim 4 , wherein the third antenna element and the fourth antenna element have a first vertical projection on the metal partition plane, wherein the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element have a second vertical projection on the metal partition plane, and wherein the second vertical projection at least partially overlaps the first vertical projection.
14. The communication device as claimed in claim 13 , wherein there is a first distance between the metal partition plane and each of the third antenna element and the fourth antenna element, there is a second distance between the metal partition plane and each of the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element, and a sum of the first distance and the second distance is longer than or equal to 1 wavelength of the lowest frequency of the second frequency band.
15. The communication device as claimed in claim 4 , wherein the third antenna element and the fourth antenna element have a first vertical projection on the metal partition plane, wherein the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element have a second vertical projection on the metal partition plane, and wherein the second vertical projection does not overlap the first vertical projection at all.
16. The communication device as claimed in claim 15 , wherein there is a first distance between the metal partition plane and each of the third antenna element and the fourth antenna element, there is a second distance between the metal partition plane and each of the ninth antenna element, the tenth antenna element, the eleventh antenna element, and the twelfth antenna element, and a sum of the first distance and the second distance is longer than or equal to 0.5 wavelength of the lowest frequency of the second frequency band.
17. The communication device as claimed in claim 15 , wherein the metal partition plane has one or more slots.
18. The communication device as claimed in claim 17 , wherein a length of each of the slots is equal to 0.25 wavelength of the lowest frequency of the second frequency band.
19. The communication device as claimed in claim 1 , further comprising:
a metal reflective plane, wherein the second antenna group is positioned between the metal partition plane and the metal reflective plane.